Rotary valve with liquid fuel injection port



C. W. HALL March 4, 1952 ROTARY VALVE WITH LIQUID FUEL INJECTION PORT Filed Nov. 28, 1949 ii i INVENTOR. CHI-424 5 W/ /4L %47TOR/V7 Patented Mar. 4, 1952 ROTARY IVALVE WITH LIQUID FUEL INJECTION PORT CharleslW. Hall, Denver,

Losey; Lakewood, Colo.

Application November28, 1949., Serial No. 129,768

3 Claims. (01. 12s s) This-.inventionrelates to a rotary ivalve ior in-ternalccombustion engines. One of the dlflicultiesencountered. in the. use-oi rotary valves: on

internal combustion engines. results from: overheating the intake-gases as.- they pass through the valve so that theyare too greatly expanded.

when they entertheengine. cylinder. Another difficulty results'from over-heatin of the rotary valve itself which. makes sealing difiicult and.

often results in seizure of. the valve.

Therprincipalobject.of this-invention is-to pro.-

vide arotary valve whichwill be air cooledaand innwhich. the length of travel ofthe intake gas through the valvewill-rbeexceedingl 'short so as to prevent over-heating. of the gas.

Another. object-of: the: invention is to combine with a rotary valvevfoninternal combustion en- 9,113.85? a port whereby liquid fuel may be injected into the: combustion .chamYo-er at the proper time for. ig-nitionpurposes so as to enable asingle valve to erused forcontrollingtthe cylinder gases and. the liquid fuel as =used=in injector and Diesel type engines;

Otheriobjectsand advantages reside in the detail construction ofr'the invention, whichisde signed for simplicity, economy, and efiiciency. These will become-more; apparent from the following description.

In the following detailed idescription of the invention, reference. is had tothe accompanying drawing which forms a part hereof. Like numerals refer to like parts in all views of the drawing and throughout the description.

In thei'drawing:

Fig... 1 is. a; vertical section through the. head of"arfour-cycle internal combustion engineeyl; ind'er illustrating the improved valve 'in'pla ce therein. in the intake cycle;

Fig, 2 iszaasimilar view' illustrating the rotary valve in the exhaust cycle position;

Fig. 3 is a horizontal section, taken on the line 3-3, Fig. 1;

Fig. 4 is a vertical section through the head of a two-cycle internal combustion engine illustrating an alternate form of the improved valve in the fuel injection cycle; and

Fig. 5 is a horizontal section, taken on the line 5 5, Fig. 4.

The first form of the inventiomas illustrated in Figs. 1, 2 and 3, is designed for use on fourwith suitable water jackets 32 for cooling pur- 0010., assignor to M. S.

poses. The engine, of course, may have as many; of the cylinders l0 as desired. All cylinders aresimilar and the description willrefer to but a single cylinder.

A rotary valve I2 is mountedin the valvehousing H over the cylinder [0. The valve l2 may be rotated in any desired manner at one-half.

crank shaft speed. As illustrated, the valveis rotated from a worm l3 on a valveshaft M which. meshes with. a worm gear l5 formed on the upper extremity of the valve. The worm l3 and the valve are covered. by means of a cap plate: IS.

The valve I2 is hollow; thelower portion thereof: is cylindrical and the'upper portion is conical. The bottom of the valve is closed. bya flat bottom plate 24. An intake passage llcommunicates from the cylindrical wall thereof through the flat-bottom plate thereof. The posi-- tion'of the intake passage in the flat bottom plate is eccentricfofthe axis of the valve so that at each revolution. of. the latter, the passage'will registerwith a cylinder port l8 opening to thecylinder H]. A laterally expansible sealing ring I 9 'surroundsthecylinder port l8 and seals the latterz'toithe fiatbottom of the valve.

An exhaust passage is also formed in the valve" [2 extending from an eccentric position on the valve'bottom' to an axial position at the valvetop: Thelowerextremity of the exhaust passage lfl' registers with the cylinder port l8 once at'eachrevolution" of the valve I2. The upper 'extremity'of the exhaust passage 20. is in constant communication with an axially'posi tion'ed exhaust port '2 I It can be seen that when the valve is rotated in thedirection'of thearrow A in Fig. 3, gas

will bedrawn into the cylinder ill on the intake stroke. Theva'lve'will then move'so that the-bottom thereof will close the port! forthe compression and explosion strokes. As the piston returns on the exhaust cycle, the exhaust passage 20 will be registered with the cylinder port l8, as shown in Fig. 2, allowing the exhaust gases to flow through the exhaust passage 20 and the port 2|.

The valve is provided with cooling air ports 23 which register with an air intake passage 22 and an air discharge passage 25 in the valve housing. Cooled air is forced into the intake passage 22, thus, constantly supplying fresh cooling air through the interior of the valve.

The valve is lubricated by means of a laterally expansible lubricating ring 26 which is positioned against the bottom thereof opposite to the sealing ring 19 to assist the latter in forcing the rotary valve upward against its conical seat. Lubricating oil is furnished to the ring 26 by means of an oil passage 21.

The valve as thus described would function on any four-cycle internal combustion engine to which fuel gas is supplied. For use on liquid fuel injection engines, air would be intaken through an intake port 28 and passage 11. Liquid combustion fuel is then supplied through a fuel port 29 which registers with a fuel passage 30 in the valve l2. The passage 30 leads to a fuel nozzle 3| in the intake passage H. The port 29 is connected to any source of liquid fuel under pressure. The amount of fuel injected would be determined by the pressure thereon and by the time interval necessary for the passage 30 to close the port 29.

The same principle can be applied to a twocycle engine, as shown in Figs. 4 and 5, in which a rotary valve 33 is mounted in a valve housing 34 on an engine cylinder 35. The valve may be driven in any desired manner at crank shaft speed. As illustrated, it is driven from a worm shaft 36 and worm gear 31 similarly to the previously described form. The valve may also be cooled by means of air ports 38 similarly to the previously described form.

In the two-cycle form, however, the valve 33 does not have an intake passage, it is provided with an exhaust passage 39 which registers once at each revolution of the'engine crank shaft with a cylinder port 40. The upper extremity of the passage 39 is in constant communication with an exhaust port 4|. A fuelpassage 42 is formed in the valve 33 and extends'from an eccentric position on the bottom of the valve to a position on the cylindrical wall thereof: where it registers with a fuel port 43 in the valve housing 34. When the fuel passage 42 is in communication with the fuel port 43, it is also in communication with the cylinder port 40 and this position corresponds to the completion of the'compression cycle of the engine.

Thus, when the air in the cylinder 35 is at its highest compression, fuel is injected therein for ignition and explosion purposes. The passage 42 then immediately moves from the port 43 for the explosion cycle and the exhaust passage 39 moves into alignment with'the port 40 for the exhaust cycle. The air is intaken as is usual in twocycle engines, either through a piston port or a piston controlledport from the crank case or from a source of pressure (not shown).

While a specific form of the improvement has been described and illustrated herein, it is to be understood that the'same may be varied, within the scope of the appended claims, without departing from the spirit of the invention.

Having thus described the invention, what is claimed and desired secured by Letters Patent is:

l. A rotary valve for internal combustion engines' comprising: a hollow rotary valve having cylindrical lower portion terminating in a conical upper portion with a flat bottom in the lower portion; and exhaust passage extending ii oman eccentric position on said bottom to an axial position at the apex of said conical top; annular means surrounding said apex for imparting rotation to said valve; an intake passage extending from an eccentric position on said bottom to a position on the peripheral wall of said valve; and a liquid fuel passage extending from aposition on the conical surface of said valve to a discharge orifice within said intake passage.

2. A rotary valve for internal combustion en- .gines comprising: a hollow rotary valve having to a concentric position at the apex of the conical portion of said valve; and a liquid fuel passage extending from a position on the circumferential a surface of said valve and communicating eccentrically through the flat bottom of said valve.

3. A' rotary valve construction for an internal combustion engine cylinder comprising: a closure at the extremity of said cylinder having a cylinder port position eccentrically of the axis of said cylinder; a rotary valve positioned over and coaxially with said cylinder; an exhaust passage in said valve extending from an eccentric position .on the lower surface thereof to a concentric position at the upper surface thereof; a fuel passage in said valve extending from an eccentric position on the lower surface thereof to a position on the cylindrical wall thereof, the ec-- 'centricity of said exhaust and fuel passages being such that they will register with said cylinder port once during each revolution of said valve; a head enclosing said valve; a fuel port formed in said head and positioned to register with said fuel passage; and means for receiving the exhaust from the concentric extremity of said exhaust passage.

CHARLES W. HALL.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS 

